1.2 · Data vs Information

Goal: explain in your own words why "data" and "information" are not the same thing, and identify each in any scenario.

The one-line difference

Data is raw, unprocessed facts. Information is data that has been organised, interpreted, or given context so that it is useful for decision making.

Said another way:

Data + context + meaning = Information

A concrete example

Look at these numbers:

36.5   38.7   36.8   39.1   37.0

Right now this is data: five numbers in a row. We cannot decide anything from them.

Now add context:

"These are five children's body temperatures (in °C) measured at our school entrance on Monday."

The same digits now become information: we can see that the second and fourth readings are abnormally high and flag the children for follow-up.

The numbers did not change. What changed is the meaning we attached.

A useful 4-stage model: DIKW

The DIKW pyramid extends the simple data → information idea with two more levels you may meet in essays:

        ▲ Wisdom        — knowing why & deciding what to do
       ─┼─
       ▲ Knowledge     — patterns and rules learned from information
       ─┼─
       ▲ Information   — data with context & meaning
       ─┼─
       ▲ Data          — raw facts and observations

Level	School example
Data	Marks: 78, 65, 90, 55, 82
Information	These are five students' ICT exam marks; the class average is 74.
Knowledge	Students who attend tutoring score 10 marks higher on average.
Wisdom	We should fund a free after-school tutoring programme.

You will rarely need DIKW for Paper 1, but it is useful for SBA-level reflection.

Types of data

The C&A Guide explicitly lists five data types you should recognise:

Type	Examples
Text	names, addresses, sentences
Number	exam marks, prices, temperatures
Image	photos, scanned documents, diagrams
Audio	voice recordings, songs, podcasts
Video	lecture recordings, CCTV footage

Be ready to identify the data type for any field in a given scenario.

Why the distinction matters

1. Cost — storing data is cheap; turning it into information takes effort.
2. Decision making — managers act on information, not data dumps.
3. Privacy — combining harmless data items can create sensitive information (e.g. name + DOB + class → identifies an individual student).
4. Legal duty — laws like the Personal Data (Privacy) Ordinance regulate how organisations handle personal information, not just raw data.

Worked example · Bank transaction

Item	Data or information?	Why
"23/06/2026 11:14 +HK$500.00"	Data	Just a row in a log
"Your account received HK$500 on 23 June at 11:14"	Information	Same fact phrased so the customer can act
"73% of your incoming transfers happen on Friday afternoons"	Information (insight)	Aggregated to show a pattern
"Send a Friday-afternoon savings reminder push notification"	Wisdom	Decision based on the insight

Common student mistakes

Mistake	Why it's wrong
Saying "raw numbers are information"	Numbers without context are data, not information.
Confusing "information" with "report"	A report is one way of presenting information.
Claiming "video is not data"	Video is digital data once recorded — pixels per frame, audio samples, etc.
Treating data and information as interchangeable synonyms	They are not. The exam tests the distinction.

Practice activity

For each of the following, label it as D (data) or I (information):

1. 192.168.1.10
2. Your home Wi-Fi router has IP address 192.168.1.10
3. Five rows of name, age from a CSV
4. "The average age of registered members is 21.4 years"
5. A folder of 600 raw .wav files from a microphone
6. A speech-to-text transcript labelled by speaker

Answers

1. D 2. I 3. D 4. I 5. D 6. I

Exam-style question

Q (3 marks): Describe two differences between data and information with reference to the school's exam paper marking process.

Sample answer:

1. Form: data is a list of raw marks like 45, 67, 89; information is the same list interpreted as "two students passed, one failed" once we know the pass mark is 50.
2. Usefulness: data alone does not help the teacher decide who needs remedial help; information allows the teacher to act.
3. (Either of the above earns marks; a third point such as context or decision support can complete the answer.)

Key takeaways

• Data is raw. Information is data + context + meaning.
• The HKEAA expects clear differentiation; do not mix the terms.
• Five data types: text, number, image, audio, video.
• Context turns the same bytes into different information depending on who reads them.

➡️ Next: 1.3 Information Processes